Remove inkscape from the list of optimal requirements

Very heavy package, and virtually useless.

Guides/wiki.md

@@ -19,6 +19,8 @@ Do not use wiki in url filepath.
 
 
 ```
+sudo -u postgres psql
+
 CREATE USER wiki_app WITH NOCREATEDB NOCREATEROLE NOSUPERUSER ENCRYPTED PASSWORD '52w7maa..';
 
 CREATE DATABASE wiki_db WITH OWNER wiki_app;
@@ -33,7 +35,7 @@ sudo apt install apache2 php libapache2-mod-php php-xml php-mbstring
 
 Optimal :
 ```
-sudo apt install php-apcu php-intl php-gd php-cli php-curl inkscape
+sudo apt install php-apcu php-intl php-gd php-cli php-curl
 ```
 
 If php-apcu :